iTSX vs FastR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iTSX
Tune and monitor your vehicle's performance using your iPhone or iPad. This app requires a specific wireless OBD-II interface to adjust engine parameters, view real-time data, and run performance tests. It also allows for reading and clearing diagnostic trouble codes.
- Vehicle programming for performance gains
- Pre-loaded dyno-proven tunes
- Adjustable speed limiter
- Virtual gauges and data monitoring
- Record and review data logs
- Performance tests (0-60, 1/4 mile)
- Read and clear diagnostic trouble codes
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TUNE YOUR VEHICLE WITH YOUR iPHONE / iPAD! NOTE: This app requires the iTSX Wireless OBD-II Interface. Visit https://sctflash.com/Products/unfiltered-product/sct/SCTITSX/sct-itsx for more information. The iTSX App lets you control the vehicle-tuning and monitoring capabilities of the iTSX Wireless OBD-II Interface... the first & only “Made for iPod – iPhone – iPad” vehicle tuner & OBD-II monitoring product on the market. The iTSX Wireless OBD-II Interface plugs into your vehicle’s OBD-II diagnostic connector, and communicates with your Apple device via a secure Bluetooth wireless connection. When used with the iTSX Wireless OBD-II Interface, the iTSX App provides the following features: VEHICLE PROGRAMMING • Increase your vehicle’s Performance in Minutes • Works with 1996 - 2012 Ford Gas & Diesel vehicles • Works with popular GM vehicles (see What's New) • Pre-Loaded Dyno Proven Tunes for the Most Popular vehicles • Re-Calibrates the Vehicle using Bluetooth Wireless Technology • Ability to set your vehicle’s Speed Limiter for young drivers VIRTUAL GAUGES / DATA MONITORING / DATA LOGGING • On-Screen Virtual Gauges with Adjustable Warning / Alert lights • Monitor Vehicle Engine Data / Parameters via Virtual Gauges • Record & Review Recorded Data Logs • Huge Virtual Gauges on iPad VEHICLE PERFORMANCE TESTS • 0-60MPH Test: Virtual Speedometer & Graph with Estimated Horsepower • ET / MPH Test: 1/8th mile & 1/4 mile ET / MPH with Estimated Horsepower • Top Speed Test • Braking Test VEHICLE DIAGNOSTICS • Reads & Clears Vehicle Diagnostic Trouble Codes ( Check Engine Light ) • Diagnose your vehicle’s Diagnostic Trouble Codes using your mobile device
FastR
Measure your vehicle's acceleration performance with this app. It automatically tests 0-60 and quarter-mile times with millisecond accuracy. Compete with others on a real-time leaderboard and save results for different car models.
- Hands-free, automated acceleration testing
- 0-60 and Quarter mile time measurement
- Millisecond accuracy
- Real-time user ranking
- Save times for different car models
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FastR is the #1 vehicle acceleration performance app in the game! Test your vehicle's 0-60 and Quarter mile times, in a hands-free, fully automated manner. You can also post your acceleration times to our leaderboard to earn bragging rights. - Features accuracy to the millisecond - Displays your rank amongst other users in real time - Lets you save acceleration times from different car models See how your vehicle's acceleration performance compares with others.
Screenshots
Verdict
The clearest difference is rating: FastR at 4.4 against iTSX's 2.3. FastR also leads on review sentiment (38% vs 24%) and ratings volume (319 vs 45). iTSX's advantage is in-app purchases (none vs 2) and update cadence (every 2 months vs every 5 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FastR sells 2 one-off in-app purchases. iTSX asks for nothing beyond the download.
FastR holds the better App Store score, 4.4 against 2.3. That said, the two scores are not equally well evidenced: FastR has 319 ratings behind it against 45, so its average is the more settled of the two. Written reviews point the same way: 24% of iTSX's written reviews are positive against 38% of FastR's.
iTSX ships an update every 2 months, FastR every 5 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | iTSX | FastR |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (45 ratings) | 4.4 (319 ratings) — better |
| Positive reviews | 24.5% of reviews | 37.5% of reviews — better |
| Number of ratings | 45 | 319 — better |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 35 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | SCT Performance | Erhies Fekarurhobo |
Customer experience
iTSX
FastR
Bugs and requests
iTSX
Not enough reviews yet to summarise bugs or requests.
FastR
Reported bugs
10 issues- Network connection errors preventing vehicle selection
- Facebook login buffering and not connecting
- App fails to record and save acceleration times
- GPS speed readings lag significantly behind actual speed
- App crashes on launch or during use
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- Settings not saving properly without login
- Leaderboard functionality broken
- App doesn't start recording until vehicle is already at speed
- Inconsistent timing results on identical driving conditions
- Loading screen stuck on 'select vehicle' with persistent network errors
Requested features
10 requests- GPS-based auto-start feature instead of manual start button
- Audio cues for 'ready, set, go' countdown
- Alternative login methods beyond Facebook
- Save vehicle selection for future sessions
- Support for multiple vehicles per account
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- Social media sharing integration
- In-app instructions and user guide
- Add missing car models (Tesla Model Y, Russian models, high-spec variants)
- Allow custom vehicle entry if model not found
- Real-time sound feedback during acceleration test
In-app purchases
iTSX
No in-app purchases
FastR
- 10 Leaderboard Posts$3.99
- Unlock 1/4 Mile Timing$5.99
